diff --git a/doc/man3/X509_dup.pod b/doc/man3/X509_dup.pod
index a92d82098d246..d348acdfd26d6 100644
--- a/doc/man3/X509_dup.pod
+++ b/doc/man3/X509_dup.pod
@@ -139,6 +139,7 @@ OSSL_CMP_PKISI_free,
 OSSL_CMP_PKISI_it,
 OSSL_CMP_PKISI_new,
 OSSL_CMP_PKISTATUS_it,
+OSSL_CRMF_CERTID_dup,
 OSSL_CRMF_CERTID_free,
 OSSL_CRMF_CERTID_it,
 OSSL_CRMF_CERTID_new,